Shipping drum and method of assembling the same



June 5. 1928.

H. E. MCCRERY SHIPPING DRUM AND METHOD OF ASSEMBLING THE SAME L1 Wk MM( M 5, m

Patented June `5, 1928.

vUNITED STATES PATENT OFFICE.

HAROLD E. MCCRERY, `0F APOLLO, PENNSYLVANIA, ASSIGNOR TO` PITTSBURGH STEEL DRUM COMPANY, 0F PITTSBURGH, PENNSYLVANIA, A CORPORATION 0F DELA- WARE.

Application ined FebruaryY This invention relates to metal drums and a method of assembling' the same.

An important obJect of the invention is to arovide a novel method of assembling the ping drum adapted to be formed of light gage metal having an interlocking seam, the seam being provided with openings and a non-metallic `strip being arranged against the seam inwardly thereof and adapted to receive fastening elements driven therein through the openings in the seam.l

A still further object isto provide fastening elements provided vwith pointedy ends, such as tacks or the like, the fastening elements being longer than the combined thicknesses of the seam and packing strip whereby the latter may be placed upon a. suitable anvil to turn the ends ofthe fastening elements back into the strip when the fastening ,Y elements are driven into position.

Other objects and advantages of the invention will become apparent during the course of the following description.

In the drawings I have shown one embodi-` ment` of the invention. In this showing:

Figure 1 is av central vertical sectional view.

Figure 2 is a. detail transverse sectional view through the seam showing the method of assembling the elements, 1

Figure 3 is'a detail longitudinal sectional view through one side ofthe drurn showing Vit in position on the anvil, and,

Figure 4 is a detail fragmentary sectional view taken longitudinally through the seam r and associated elements.

, Referring to the drawings the numeral l()` designates the body of the drum preferably formed of light gage material, preferably sheet steel having wooden or other heads 11 arranged therein. The ends of the body are provided with inwardly turned anges 12 to which metallic heads may be secured in any suitable manner, if desired. The body SHIPPING DRUM AND METHOD ASSECMBLING THE SAME.

a, 192e. serial No. svioso.

of t-hedrum isprovided With inwardly extendlng beads 13 againstwhich the heads 11 rest and is further provided with series of reinforcing ribs 1.4 extending throughout thegreater portion of the circumference of the drum. y

Referring `to Figure 2, the numeral 15 designates an interlockingseain formed at the` edges of the body portion of thedrum.. In forming the seam, lips 16 are turned backwa-rdly from the body of the drum and are adapted to engage each other whereby a plurality of overlapping thicknesses of metal are provided. The seam 15 is provided with a series of spaced openings 17 extending through the successive thicknesses of the metal and fastening elements 18 are adapted to be arranged in these `openings, in a `manner to be described. A strip of nonmetallic material 19 is arranged against the inner face of the seam, as shown in `Figures f 2 and 4. The strip 19 is preferably formed of` wood so that the fastening elements `may be readily driven thereinto, as `will be apparent. The fastening `elements employed are provided with heads 20 and pointed ends ,21, and the fastening elements are of a length substantially greater than the com- 19. In assembling the elements just described, the body of the drum is adapted to be placed over an anvil 22 with the strip 19 arranged in a longitudinal groove 23 formed in the anvil. n.

In practice I prefer to provide the body of the drum with reinforcing beads 24: arranged adjacent and parallel to the seam to assist `in preventing outward buckling thereof although these beads are not essential. -The reinforcing beads 14 preferably extend to points adjacent the `beads 24, as shown in Figure 1. i

In assembling the drum, the seam 15 is formed in the usual manner and the elements thereof are assembled and rolled to provide a tight joint as will be apparent. The spaced openings 17 are then punched or otherwise formed in the seam to receive the fastening elements 18. The strip 19 is then arranged in the groove 23 and the drum is placed in position with the seam 15 arranged against the upper face of -thestrip 19, as shown in Figure 2. The fastening elements are then driven into the strip 19 through the openings 17 until the heads 20 of the fastening elements contact'with the outerface of the seam 15. As previously stated, the length of the fastening elements is substantiall greater than the combined thicknesses of tie seam 15 andstrip 1 9, and accordingly, the point of the fastening elements will contact with the anvil 22 before the heads 2L) contact with the outer face of the seam. It will be apparent that if the fastening elements are driven downwardly to Cause the heads thereof toy snugly Contact with the outer face of the seam, the points 21 of the fastening elements will be turned upwardly into the strip19, thus securely anchoring them in position. It has been found that light gage sheet steel is not adaptable for use in connection with shipping drums where the latter are usedfor shipping relatively heavy material owing to the flexibility of the metal which causes the seams to open. It has been found that the provision. of rivets for securing the seams against opening is too`expensive for commercial use owing not only to the cost of the rivets but also to the costjoffassembling. Accordingly the present method and structure is provided for turning the pointsof the fasteningelements into the Wood or other strip 19 sierving to firmly anchor the fastening elements in position and thus preventing loss of the fastening elements. Thus it will be obvious that a drum formed according to the present'v method is adapted to bey used for shipping heavy materials without danger of the seams opening during use.

Itr isl to be understood that the form of the practice of the method and-in the size, shape and arrangement of parts may be made without departing from the sp' it ofl the` invention or the scope of the sulgoinefi'claims.

I claim:

1. The hereinpdescribedqmethod `of assembling sheet metal drums which consists in forming aninterlocking seam at the edges of the material forming the body of the drum, providing said scam with anopening7 placing a Strip ofmaterial on an anvil, arranging the inner face of the seam on said strip of material, and driving a fastening element into said'strip offniaterial through said opening whereby the endofsaid fastening element will contact withthe anvil and be turned back into said strip of material.

2. A shipping drum comprising a sheet metall body provided with anv interlocking seam havinvr a plurality ofspaced openings therethroug avstrip of material arranged against the inner face of saidy seam, and a fastening elementV driven into said strip of material througheach of the openings in said seam, said fastening element-s having heads at their outer ends adapted to be driven into contact with the outer face of saidI seam, said fastening elements being longer than the combined, thicknesses ofsaid seam and said stripof'materialand `having pointed inner ends turned back into said strip of material.

In testimony whereof 'I aix myV signature HAROLD E. Mconnmr.V 

